Jillian Michaels Cheated on 'Biggest Loser,' So Ruben Will Return

After it was revealed that trainer Jillian Michaels broke rules on "The Biggest Loser" by giving caffeine supplements to her team members, ousted fan favorite Ruben Studdard is returning to the reality show competition.

Just before the weekly weigh-in of this week's episode, host Alison Sweeney announced the scandal to the players.

"Before you all step on the scale, there is something important that needs to be addressed," Sweeney said. "Last week, Jillian broke the rules and gave caffeine supplements to each member of her team without doctors' permission."

Michaels' team received a 4-pound penalty as a result, or one pound per team member. The show also declared the previous week's results as "invalid," which set off a chain reaction of sorts. Bob Harper's blue team then had their immunity restored, and Studdard returned to Dolvett Quince's red team.

Michaels defended her actions.

"I stand by my opinion, a caffeine supplement is significantly healthier than unlimited amounts of coffee," Michaels said, while not addressing the issue that supplying supplements without medical approval is against the rules. "My only regret is that my team, they're the ones suffering the consequences of my professional opinion."

Responding to a viewer tweet Tuesday that she was "being used to bring a famous contestant back," Michaels tweeted back: "you're spot on." A show spokesman told the LA Times that executives weren't available to discuss the incident or the decision to bring Ruben back.